Identificação de parâmetros de uma mesa com três graus de liberdade utilizando problemas inversos

Abstract

In this work present work was realized the identification of the damping and stiffness parameters of a table with three degrees of freedom, that was previously constructed. For this work, two different cases have been used. At first, it was considered only an identification number parameters based on application of inverse problems associated with an optimization technique called Differential Evolution. In this case, the objective function consisted of minimizing the difference between the Frequency Response Function obtained considering that stiffness and damping parameters were known and the Frequency Response Function identified. At the end of this first analysis, it was performed to compare the real and identified Frequency Response Functions, demonstrating the validity of the proposed methodology. In the second case, the identification was made by minimizing the objective function performed by numerical and experimental natural frequencies. In this case, the identified stiffness and damping parameters were used to calculate the numeric natural frequencies, comparing them with the actual natural frequency of the table.